Inner tube for pneumatic tires.



. No. 739,024. PATENTED SEPT. 15, 1903'.

' I. E. PALMER.

CANOPY SUPPORTING FRAME.

APPLICATION FILED MAY 12, 1903.

I0 MODEL.

Wnemfifl 9 Q acme, Q. 0% h 0 M1 UNITED STATES.

Patented September 15, 1903.

PATIENT OFFICE.

INNER TUBE FOR PNEUMATIC TIRES.

SR'ECIFICATION forming part of Letters Patent No. 739,025, dated September 15, 1903.

Application filed April 14, 1903.

To all whom it may concern:

Be it known that I, THERON R. PALMER, a citizen of the United States, residing at Jeannette, in the county of Westmoreland and State of Pennsylvania, have invented certain new and useful Improvements in Inner Tubes. for Pneumatic Tires; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same,refere'nce being had to the accompanying drawings, and to the letters of reference marked thereon, forming part of this specification. 1

My invention relates to inner tubes for pneumatic tires, and particularly to inner tubes used with a sheath or casing in which the closed ends of the inner tube overlap each other.

The objects of this invention are to elfect an economical and permanent closure of the ends or terminals of such inner tubes, without the use of molded caps or other additional parts, by means of cement and without it being necessary to vulcanize the parts together, so as to form a permanent closure which wilbeffectually prevent the escape of air therefrom and be adapted to overlap upon the inflatable portions of thetube ends .and resist rupture and wear when the tube has been inserted in a,tire-sheath and infiated therein.

The features of myinvention are hereinafter set forth and described, and illustrated in the accompanying drawings, in which- Figure 1 is a plan view of a section of the end of an'inner tube prepared for closing. Fig. 2 is a planview of the same with the end folded back at the dotted lines in Fig. 1. Fig. 3 is a sectional view of the same after the first step in making the closure is completed. Fig. 4: is a sectional view of the same, showing the closure completed.

In the drawings, A is a section of the end of an inner tube having one side of its terminus preferably cut away at a, so that when folded back upon the tube, as shown in Fig. 4, at the termination of the fold but one thickness thereof is imposed upon the outside of the tube, thereby avoiding a thick end at the termination of the fold. In taking the first step in making this closure I turn Serial No. 152,505. (No model.)

the part A of the tube end back to the dotted line a, outwardly over the outside of the tube A, as illustrated in Fig. 2. I then cover the entire outside surface of the part A, which is normally thezinside surface of the tube end, with a suitable cement, after which I turn the part A back to its normal position, which brings the cemented inside surface of the part A together, so that when pressure is applied thereto the surface so cemented adheres and forms a closure held .together by a layer of cement B, as illustrated in Fig. 3. This closure, however, unless it is vulcanized, will not withstand the strain of the air-pressure upon it when in use, but will gradually open up and finally allow the air in the tube to escape. part of the closure and to do away with the necessity of vulcanizing the part A together, which operation is both expensive and injurious to the tube, I cover one side of the outside of the part A and the same side of the tube A back from the part A a distance equal to the length of the part A with a layer of cement B, as illustrated in Fig. 3, and I then fold the cemented surface of the partA' back upon the cemented surface of the tube A, as illustrated in Fig. 4, after which I apply pressure thereto, so as to complete the closure,

as illustrated in Fig. 4. It will be readily seen that in this manner I am enabled to form my improved tube-end closure out of the end of the tube itself without employing any extraneous parts therefor and that I am also enabled thereby to form a closure wholly.

secured by cement and without vulcanization, thereby making a tube-end closure at the minimum amount of expense in which I attain the maximum amount of resistance to rupture and wear when in use. Having thus described my invention so as to enable others to utilize the same, what I' claim as new, and desire to secure by Letters Patent of the United States, is-

1. In an inner tube for pneumatic tires, an

end closure consisting substantially of the end portion thereof collapsed and cemented together so as to entirely close the tube, and this collapsed and cemented portion turned back upon and cemented to the outside of the tube, substantially as set forth.

' 2. In an inner tube for pneumatic tires, an

To overcome this weakness in this IOC 1. A canopy-supporting frame comprising side and end pieces, socket-pieces at the corners for connecting the sides and ends in removable adjustment, a center support, cords leading from the center support to the socketpieces at the corners and a cross-brace attached to the side pieces. and extending through the center support.

2. A canopy-supporting frame comprising side and end pieces consisting, of Wires or rods and having their adjacent ends turned at angles of forty-five degrees, socket-pieces consisting of tubes of substantially uniform diameter and adapted to receive the sides and ends, a center support, cords leading from the tubular socket-pieces to the center support and a cross-brace attached to the sides and engaged with the center support.

3. A canopy-supporting frame comprising side and end pieces and having their ends bent, tubular corner-pieces for receiving the bent ends of the side and end pieces, a central support comprising a hook and eyes formed upon opposite sides of its shank, suspension devices leading from the corner-pieces at one end to one of said eyes, suspension -cords leading from the corner-pieces of the opposite ends to the other of said eyes and a crossbrace engaged with the opposite side pieces and having a free sliding engagement with the central suspension device.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 7th day of May, 1903.

ISAAC E. PALMER.

Witnesses:

PAUL S. CARRIER, CHAS. M. SAUER. 

